- Some cleanups resulting from the update to the wrapper
compilers for 32/64 bit support
- A new configure option to deal with some fixes for the
MPI::SEEK_SET (and friends) issue
- Some cleanups in the pthreads configure tests

The only real affect for everyone should be that you'll have to
re-autogen.sh. And that the 32/64 include and libdir flags will no longer
be available. I will be updating the wiki shortly w.r.t. how to build a
multilib wrapper compiler shortly.